About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Hume-Rothery Symposium: Interface Structure and Properties: Impact on Microstructure Evolution
|
| Presentation Title |
Hume-Rothery and Atomic Misfits |
| Author(s) |
William A. Curtin |
| On-Site Speaker (Planned) |
William A. Curtin |
| Abstract Scope |
Among many other ideas, Hume-Rothery taught us that the phase stability of solid solution alloys can depend on atomic size misfits. Solute strengthening of alloys also depends on these misfits. Atomic misfits and the Hume-Rothery “misfit parameter” are typically based on the notion of an atomic radius for each elemental species. Here we discuss the proper description of misfit volumes of solutes in alloys and apply it to the computation of solute misfits in a range of complex High Entropy Alloys. We then examine the simple approximation of Vegard’s Law (for atomic volumes rather than lattice constants) and demonstrate its accuracy, or not, across a variety of fcc and bcc alloy families. Finally, the successes of recent solute-strengthening theory using misfit volumes is shown. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, High-Entropy Alloys, Mechanical Properties |